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Crystal symmetry and the reversibility of martensitic transformations

Bhattacharya, Kaushik and Conti, Sergio and Zanzotto, Giovanni and Zimmer, Johannes (2004) Crystal symmetry and the reversibility of martensitic transformations. Nature, 428 (6978). pp. 55-59. ISSN 0028-0836.

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Martensitic transformations are diffusionless, solid-to-solid phase transitions, and have been observed in metals, alloys, ceramics and proteins. They are characterized by a rapid change of crystal structure, accompanied by the development of a rich microstructure. Martensitic transformations can be irreversible, as seen in steels upon quenching, or they can be reversible, such as those observed in shape-memory alloys. In the latter case, the microstructures formed on cooling are easily manipulated by loads and disappear upon reheating. Here, using mathematical theory and numerical simulation, we explain these sharp differences in behaviour on the basis of the change in crystal symmetry during the transition. We find that a necessary condition for reversibility is that the symmetry groups of the parent and product phases be included in a common finite symmetry group. In these cases, the energy barrier to lattice-invariant shear is generically higher than that pertaining to the phase change and, consequently, transformations of this type can occur with virtually no plasticity. Irreversibility is inevitable in all other martensitic transformations, where the energy barrier to plastic deformation (via lattice-invariant shears, as in twinning or slip) is no higher than the barrier to the phase change itself. Various experimental observations confirm the importance of the symmetry of the stable states in determining the macroscopic reversibility of martensitic transformations.

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Bhattacharya, Kaushik0000-0003-2908-5469
Conti, Sergio0000-0001-7987-9174
Additional Information:© 2004 Nature Publishing Group. Received 2 September 2003; accepted 28 January 2004. This work was largely carried out when J.Z. held a position at the California Institute of Technology. The work of S.C. and J.Z. was partially supported by the Deutsche Forschungsgemeinschaft. G.Z. acknowledges the partial support of the Italian MIUR (CoFin Modelli Matematici per i Materiali). S.C. and G.Z. acknowledge the partial support of the IV Framework Programme of the EU. K.B. and J.Z. acknowledge the partial financial support of the US Air Force Office of Scientific Research and the US Office of Naval Research. All authors contributed equally to this work.
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Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR)UNSPECIFIED
European Union (EU) IV Framework ProgrammeUNSPECIFIED
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Office of Naval Research (ONR)UNSPECIFIED
Issue or Number:6978
Record Number:CaltechAUTHORS:20131007-130456440
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41715
Deposited By: Tony Diaz
Deposited On:07 Oct 2013 20:12
Last Modified:09 Mar 2020 13:18

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